ManualThe CTK-900 includes 61 Full-Size keys, 32-Note Polyphony, 824 Tones, 160+16 Rhythms, 232 Digital Effects, DSP, General MIDI, 5-song/6-track Sequencer, Backlit LCD, Touch Sensitive, Internet Data Expansion Capability, Assignable Pedal Jack, ZPI sound Chip, Larger Internal memory, CD Rom Included.
SP-20
 | The Casio SP-20 is a traditional piano-style pedal that plugs into your Casio keyboard or digital piano. It is designed to sustain notes in the same way as the damper pedal on an acoustic piano.
| $ 39.99 |
SP-3
 | Add an optional sustain pedal to your keyboard for easier playability.
| $ 24.99 |